- Added 'emit_to_endpoint' method at SocketManager
- Reworked the mixins to use the new code
- The RedisMapping used for session uses 'pickle' now (so we can add more complex objects to the sessions)
- Refactored the django_chat example to work with the new changes
- 'transports' was not passed to the server in sgunicorn, so it seems it was never used